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3 inch length Square Head Bolts

Square Head Bolts were once the most common form of bolt, until they were replaced by hex head bolts. They are covered under ANSI Standard B18.2.1 and are now most commonly used for aesthetic purposes to provide a rustic look .

155 results, (click on any line for more information)

Buy Square Head Bolts from one of our FCH Network Members
SupplierLocTypeMaterialFinishSizeDescriptionQty 
GLFOHSquare Head BoltGrade APlain3/8-16 x 33/8-16x3 square hd bolt a307 stl pln b18.2.1 () () ()28
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GLFOHSquare Head BoltGrade 5Plain3/4-10 x 33/4-10x3 square hd bolt grade 5 stl pln b18.2.1 () () ()79
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GLFOHSquare Head BoltGrade 8Plain3/4-10 x 33/4-10x3 square hd bolt grade 8 stl pln b18.2.1 () () ()5
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Bostwick INSquare Head Bolt316, 317, A4 StainlessPlain3/4-10 x 33/4-10 x 3 sq hd bolt 316 stainless151
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Bostwick INSquare Head BoltGrade 5Plain5/8-11 x 35/8-11 x 3 square hd bolt gr 560
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JacksonMSSquare Head BoltGrade 5Zinc/Clear5/8-11 x 3nc square bolt gr.52
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JacksonMSSquare Head BoltGrade 2Plain1 8 x 31 8 x 3 nc square head bolt gr. 2 plain52
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JacksonMSSquare Head BoltGrade 2Zinc/Clear3/8-16 x 33/8-16 x 3 square head bolt gr. 2 zinc plated503
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JacksonMSSquare Head BoltGrade 8Plain5/8-11 x 35/8-11 x 3 square head bolt gr. 8 plain19
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JacksonMSSquare Head BoltGrade 8Plain7/8-9 x 3square m/b finish j4293
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JacksonMSSquare Head BoltGrade 2Plain1/2-13 x 3nc square bolt gr. 2153
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JacksonMSSquare Head BoltGrade 2Plain5/16-18 x 3square bolt gr. 2179
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JacksonMSSquare Head BoltGrade 2Galvanized1/2-13 x 3square bolt hdg191
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JacksonMSSquare Head BoltGrade 5Plain5/8-11 x 3square bolt10
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AFIFLSquare Head BoltSteelPlain3/8-16 x 33/8-16x3 sq hd cup pt st () ()539
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SunPackFLSquare Head BoltGrade AZinc/Clear5/8-11 x 35/8-11x3 a307 square head bolt pt zinc105
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YANKEENHSquare Head BoltSteelPlain5/16-18 x 35/16-18 x 3 square hd bolt136
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NAPPCOTXSquare Head BoltSteelPlain5/8-11 x 3square bolt steel 5/8-11x3 (50-BOLTS) (50-BOLTS) (50-BOLTS) (50-BOLTS) (50-BOLTS) (50-BOLTS) (50-BOLTS) (50-BOLTS) (50-BOLTS) (50-BOLTS) (50-BOLTS) (50-BOLTS) (50-BOLTS) (50-BOLTS) (50-BOLTS) (50-BOLTS) (50-BOLTS) (50-BOLTS) (50-BOLTS)49
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HayesCASquare Head BoltGrade 5Plain3/4-10 x 33/4-10 x 3 square hd bolt gr 5 pln20
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HayesCASquare Head BoltSteelGalvanized3/8-16 x 33/8-16 x 3 square hd bolt hdg65
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HayesCASquare Head BoltSteelPlain1/4-20 x 31/4-20 x 3 square hd bolt pln50
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HayesCASquare Head BoltSteelZinc/Clear1/2-13 x 31/2-13 x 3 square hd bolt zinc2
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HayesCASquare Head BoltSteelZinc/Clear3/8-16 x 33/8-16 x 3 square hd bolt zinc57
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CIFILSquare Head BoltGrade 2Zinc/Yellow1/2-13 x 31/2-13x3 square head machine bolt grade 2 zinc yellow trivalent (50) (45) ()45
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ASMCILSquare Head BoltGrade AGalvanized5/16-18 x 3a307 gra square hd m/b low carb hdg b18.2.1150
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ASMCILSquare Head BoltGrade APlain1/2-13 x 3(pt) coarse a307 gra square hd m/b low carb b18.2.125
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ASMCILSquare Head BoltGrade AGalvanized5/8-11 x 3a307 gra square hd m/b low carb hdg b18.2.118
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ASMCILSquare Head BoltGrade APlain5/8-11 x 3(pt) coarse a307 gra square hd m/b low carb40
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ASMCILSquare Head BoltGrade AZinc/Clear5/8-11 x 3a307 gra square hd m/b low carb zp5
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ASMCILSquare Head BoltGrade AGalvanized1/2-13 x 3a307 gra square hd m/b low carb hdg105
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ASMCILSquare Head BoltGrade APlain1/4-20 x 3(pt) coarse a307 gra square hd m/b low carb33
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ASMCILSquare Head BoltGrade APlain5/16-18 x 3(pt) coarse a307 gra square hd m/b low carb48
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ASMCILSquare Head BoltGrade AGalvanized3/8-16 x 3a307 gra square hd m/b low carb hdg b18.2.1325
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ASMCILSquare Head BoltGrade AGalvanized1/4-20 x 3a307 gra square hd m/b low carb hdg b18.2.1128
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ASMCILSquare Head BoltGrade AZinc/Clear3/4-10 x 3a307 gra square hd m/b low carb zp b18.2.15
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ASMCILSquare Head BoltGrade AZinc/Clear1/2-13 x 3a307 gra square hd m/b low carb zp1
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JacksonMSSquare Head BoltGrade 2Plain3/4-10 x 3square bolt gr. 273
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EndriesWISquare Head BoltSteelPlain7/8-9 x 37/8-9x3 square head machine bolt plain144
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EndriesWISquare Head BoltSteelPlain1/2-13 x 31/2-13x3 square head machine bolt plain (2-1/2 minimum thread)872
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ACCURATEILSquare Head BoltSteelPlain1/4-20 x 3bolt square machine150
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ACCURATEILSquare Head BoltSteelZinc/Clear3/8-16 x 3bolt square machine f/t 3/8 blank220
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ACCURATEILSquare Head BoltSteelPlain1/2-13 x 3bolt square machine f/t500
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ACCURATEILSquare Head BoltSteelPlain3/4-10 x 3bolt square machine205
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ACCURATEILSquare Head BoltGrade 5Plain5/8-11 x 3bolt square machine gr52
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ACCURATEILSquare Head BoltSteelZinc/Clear5/16-18 x 3bolt square machine f/t5725
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ACCURATEILSquare Head BoltSteelZinc/Clear5/16-18 x 3bolt square machine1265
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ACCURATEILSquare Head BoltSteelZinc/Clear5/8-11 x 3bolt square machine135
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LibertyILSquare Head BoltBrassPlain5/8-11 x 3square hd m/b brass7
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LibertyILSquare Head BoltSteelZinc/Yellow1/2-13 x 3square m/b bolt100
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KomarILSquare Head BoltSteelZinc/Clear5/16-18 x 35/16-18x3 square hd machine bolt zinc2500
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KomarMOSquare Head BoltSteelPlain3/8-16 x 3 square head machine bolt250
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AmericanNYSquare Head BoltSteelCadmium5/16-18 x 3square bolt700
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AmericanNYSquare Head BoltSteelPlain1/4-20 x 3square m/s bolt100
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Alma BoltMISquare Head BoltGrade 2Plain1/2-13 x 3square bolt234
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Fastener OHSquare Head BoltGrade APlain3/4-10 x 3square head machine bolt 3/4-10x3 a307 plain 36
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XL ScrewGASquare Head BoltSteelPlain1/4-20 x 3f/t square hd m/b astm a3071,000
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XL ScrewGASquare Head BoltSteelPlain3/8-16 x 3f/t square hd m/b astm a307350
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XL ScrewGASquare Head BoltSteelPlain5/16-18 x 3f/t square hd m/b astm a307500
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XL ScrewGASquare Head BoltSteelPlain1/4-20 x 3square m/b std thrd fsb astm a3071,000
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XL ScrewGASquare Head BoltSteelPlain5/16-18 x 3square m/b std thrd fsb astm a307500
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XL ScrewGASquare Head BoltSteelPlain3/8-16 x 3square m/b std thrd fsb astm a307350
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XL ScrewGASquare Head BoltSteelPlain1/2-13 x 3square m/b std thrd fsb astm a307230
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XL ScrewGASquare Head BoltSteelPlain5/8-11 x 3square m/b std thrd fsb astm a307140
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XL ScrewGASquare Head BoltSteelPlain3/4-10 x 3square m/b std thrd fsb astm a30790
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XL ScrewGASquare Head BoltSteelPlain1-8 x 3square m/b std thrd fsb astm a30750
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XL ScrewGASquare Head BoltSteelZinc/Clear3/8-16 x 3f/t square hd m/b astm a307 zp350
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XL ScrewGASquare Head BoltSteelZinc/Clear5/8-11 x 3square hd m/b std thrd fsb astm a307 zp140
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XL ScrewGASquare Head BoltSteelZinc/Clear3/8-16 x 3square hd m/b std thrd fsb astm a307 zp350
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XL ScrewGASquare Head BoltSteelZinc/Clear3/4-10 x 3square hd m/b std thrd fsb astm a307 zp90
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SWACOOHSquare Head BoltGrade APlain5/8-11 x 35/8-11x3 a307 gr a square hd bolt pln38
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SWACOOHSquare Head BoltGrade APlain1-8 x 31-8x3 a307 gr a square hd bolt pln40
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EmpireWASquare Head BoltSteelPlain1/2 x 31/2 x 3 square head bolt36
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WDMBIASquare Head BoltSteelPlain3/8-16 x 3 x 6 1/4bolt u sq st (m565) 3/8-16x3x6 1/4x3 drw (W040) (W040) (W040)283
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WDMBIASquare Head BoltSteelZinc/Clear3/8-16 x 3blt u sq st (zt) 3/8-16x3 spc (W020) (W020) (W020)800
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KomarILSquare Head BoltSteelZinc/Clear5/16-18 x 35/16-18x3 square hd machine bolt zinc2500
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IPCVASquare Head BoltGrade AZinc/Yellow3/4-10 x 33/4-10x3 square hd mach bolt a307 steel zinc yellow ipc to suplly notarized material cert3,707
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IPCVASquare Head BoltGrade AZinc/Yellow5/8-11 x 35/8-11x3 square hd mach bolt a307 gr a steel zinc yellow417
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IPCVASquare Head BoltGrade AZinc/Yellow1/2-13 x 31/2-13x3 square hd mach bolt a307 steel zinc yellow675
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HBBOLTCASquare Head BoltSteelPlain3/4-10 x 3square hd m/b13
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BIG BOLTILSquare Head BoltGrade 5Plain3/4-10 x 3bolt & c/s square boltsquare fulthr b18.2.110900
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BIG BOLTILSquare Head BoltSteelPlain5/8-11 x 3bolt & c/s square bolt5/8-11x3square 2.5thd b18.2.18100
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BIG BOLTILSquare Head BoltGrade 8Plain7/16-20 x 3bolt & c/s square boltsquare b18.2.1500
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BIG BOLTILSquare Head BoltGrade 5Plain1/4-20 x 3bolt & c/s square boltsquare b18.2.16000
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BIG BOLTILSquare Head BoltGrade 5Plain5/8-11 x 3bolt & c/s square boltsquare b18.2.13000
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BIG BOLTILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3bolt & c/s square bolt300 (a1 a2 18-8 304 310 etc.)square b18.2.1500
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BIG BOLTILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 3bolt & c/s square bolt300 (a1 a2 18-8 304 310 etc.)square b18.2.1500
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BIG BOLTILSquare Head BoltGrade 5Plain1/2-13 x 3bolt & c/s square boltsquare b18.2.15000
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BIG BOLTILSquare Head BoltGrade 5Plain5/16-18 x 3bolt & c/s square boltsquare b18.2.12900
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BIG BOLTILSquare Head BoltGrade 8Plain7/16-14 x 3bolt & c/s square boltsquare b18.2.11500
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BIG BOLTILSquare Head BoltGrade 8Zinc/Yellow3/4-16 x 3bolt & c/s square boltfulthr b18.2.1500
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BIG BOLTILSquare Head BoltSteelPlain5/8-11 x 3bolt & c/s square boltsquare b18.2.19300
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BIG BOLTILSquare Head BoltGrade 8Plain1/2-13 x 3bolt & c/s square boltsquare b18.2.13200
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WDMBIASquare Head BoltSteelPlain1/2-13 x 3 x 2 5/32e/blt u sq st (zf) 1/2-13x3x2 5/32 drw (W0S0) (W0S0)99
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SunPackFLSquare Head BoltGrade AZinc/Clear5/8-11 x 3a307 square bolt pt105
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FasSpcMfgFLSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 3square m/b 18-8 s/s1
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HodellOHSquare Head BoltSteelGalvanized3/4-10 x 33/4-10x3 square head machine bolt hdg70
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HodellOHSquare Head BoltSteelGalvanized1/2-13 x 31/2-13x3 square hd mach bolt hdg42
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HodellOHSquare Head BoltSteelGalvanized1/2-13 x 31/2-13x3 square hd mach bolt hdg42
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HodellOHSquare Head BoltSteelGalvanized3/4-10 x 33/4-10x3 square head machine bolt hdg70
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ISSCOMOSquare Head BoltGrade 2Plain3/8-16 x 33495
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ISSCOMOSquare Head BoltGrade 2Plain5/16-18 x 31060
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B & K FASTPASquare Head BoltSteelPlain1/2-13 x 31/2-13 x 3 square bolts plain b18.2.1244
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B & K FASTPASquare Head BoltSteelPlain3/4-10 x 33/4-10 x 3 square bolts plain b18.2.1105
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B & K FASTPASquare Head BoltSteelPlain5/8-11 x 35/8-11 x 3 square bolts plain b18.2.111
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B & K FASTPASquare Head BoltGrade 5Plain7/8-9 x 37/8-9 x 3 square bolts gr 5 plain b18.2.125
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B & K FASTPASquare Head BoltSteelPlain7/8-9 x 37/8-9 x 3 square bolts plain b18.2.1314
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Kanebridge ILSquare Head BoltSteelPlain5/16-18 x 35/16-18x3 square machine bolt plain10,000
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Kanebridge ILSquare Head BoltSteelPlain3/8-16 x 33/8-16x3 square machine bolt plain6.250
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Kanebridge ILSquare Head BoltSteelPlain1/2-13 x 31/2-13x3 square machine bolt plain3.750
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Kanebridge ILSquare Head BoltSteelPlain5/8-11 x 35/8-11x3 square machine bolt plain1.875
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Kanebridge ILSquare Head BoltSteelPlain3/4-10 x 33/4-10x3 square machine bolt plain1.500
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OSSCORISquare Head BoltSteelZinc/Clear5/16-18 x 35/16-18x3 square hd mach bolt plated b18.2.1400
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OSSCORISquare Head BoltGrade 5Plain3/4-10 x 33/4-10x3 square hd mach bolt grade 5 b18.2.14
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NAPPCOTXSquare Head BoltSteelPlain5/8-11 x 3square bolt steel 5/8-11x349
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BHAMALSquare Head BoltGrade 5Zinc/Clear1/2-13 x 3square hd m/bolt zn3
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LippinCASquare Head BoltSteelZinc/Clear1/2-13 x 3square head bolt zinc plated60
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LippinCASquare Head BoltSteelPlain5/8-11 x 3square head bolt plain26
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JacksonMSSquare Head BoltSteelGalvanized3/4 x 3 x 3thick square washer 13/16id for 3/4 bolt232
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SRFALSquare Head BoltGrade 2Plain1/4-20 x 3square hd bolt9
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SRFALSquare Head BoltGrade 5Plain7/8-9 x 3square hd bolt1
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CNBILSquare Head BoltGrade 2Plain1/2-13 x 3square m/b gr.2179
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CNBILSquare Head BoltSteelPlain3/4-10 x 3square m/b75
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THRDFASTFLSquare Head BoltSteelGalvanized3/4-10 x 3square hd bolt hdg b18.2.120
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THRDFASTFLSquare Head BoltSteelPlain5/8-11 x 3square hd bolt b18.2.13
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THRDFASTOKSquare Head BoltSteelGalvanized3/4-10 x 3square hd bolt hdg b18.2.160
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THRDFASTOKSquare Head BoltSteelGalvanized7/8-9 x 3square hd bolt hdg b18.2.140
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THRDFASTOKSquare Head BoltSteelGalvanized7/8-9 x 3square hd bolt rt2.25 hdg b18.2.120
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THRDFASTOKSquare Head BoltSteelGalvanized5/8-11 x 3square hd bolt hdg full thread b18.2.17
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THRDFASTALSquare Head BoltGrade 5Galvanized3/4-10 x 3gr5 square hd bolt hdg b18.2.12
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THRDFASTALSquare Head BoltSteelGalvanized5/8-11 x 3square hd bolt hdg b18.2.15
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KBSTNSquare Head BoltGrade 8Plain5/8-11 x 35/8-11 x 3 square!machbolt gr-8 b18.2.1156
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THRDFASTMSSquare Head BoltSteelPlain3/8-16 x 3square hd bolt b18.2.150
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THRDFASTMSSquare Head BoltSteelGalvanized3/4-10 x 3square hd bolt hdg b18.2.18
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THRDFASTMSSquare Head BoltSteelPlain5/8-11 x 3square hd bolt b18.2.115
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THRDFASTOKSquare Head BoltSteelPlain5/8-11 x 3square hd bolt b18.2.11,641
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GUIDONNJSquare Head BoltGrade 2Black Oxide3/8-16 x 3A307A450
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All SizeTXSquare Head BoltGrade APlain5/8-11 x 35/8-11 x 3 a307 square head bolt plain b18.2.140
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BRIGHBESTILSquare Head BoltSteelBlack Oxide1 1/2-6 x 31 1/2-6 x 3 sq hd black oxide28
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FMPMASquare Head BoltSteelPlain7/8-9 x 3square bolt85
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Valley NuWASquare Head BoltSteelGalvanized1-8 x 3nc square bolt hdg20
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Valley NuWASquare Head BoltSteelZinc/Black1/2-13 x 3nc square bolt zb36
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Valley NuWASquare Head BoltSteelGalvanized7/8-9 x 3nc square bolt hdg80
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Valley NuWASquare Head BoltSteelPlain5/16-18 x 3nc square bolt pl12
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Valley NuWASquare Head BoltGrade 5Plain1/2-13 x 3nc gr5 square bolt pl18
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Valley NuWASquare Head BoltSteelZinc/Black1/4-20 x 3nc square bolt zb56
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Valley NuWASquare Head BoltSteelZinc/Black3/8-16 x 3nc square bolt zb40
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ACCURATEILSquare Head BoltSteelZinc/Clear3/8-16 x 3square m/b2,500
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ACCURATEILSquare Head BoltSteelPlain1-8 x 3square m/b65
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ACCURATEILSquare Head BoltSteelZinc/Clear5/16-18 x 3square m/b300
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ACCURATEILSquare Head BoltSteelPlain3/4-10 x 3square m/b300
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ACCURATEILSquare Head BoltSteelPlain7/8-9 x 3square m/b150
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ACCURATEILSquare Head BoltSteelZinc/Clear1/4-20 x 3square fulthr m/b500
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ACCURATEILSquare Head BoltSteelZinc/Clear5/8-11 x 3square m/b575
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ACCURATEILSquare Head BoltSteelZinc/Clear5/16-18 x 3square fulthr m/b3,000
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QFSMISquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 3Square head set screw cup point STAINLESS STEEL25
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